Question

Test scores out of 100 for a class of 20 students are as follows 93, 84, 97, 98, 100, 78, 86, 100, 85, 92, 55, 91, 90, 75, 94, 83, 60, 81, 95, 65 i) Make a frequency table taking class interval as 91 – 100, 81 – 90, ….. ii) Find the modal class iii) Find the Interval that Contains the median

Answer 1

Step-by-step explanation:

To find the median, we will place the numbers in increasing or decreasing order and find the middle number.

So, test scores in increasing order will be,

55,60,75,78,81,83,84,86,90,91,92,93,94,95,97,98,100,100

Now as we can see there are 19 number so the middle one will be 10

th

element i.e. 90. So, the interval that contains the median is 81−90.

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